GIS Dictionary

[navigation] One of the four compass directions on the earth’s surface: north, south, east, or west.

[mathematics] The correspondence or equivalency between sets; how sets relate to each other. For example, if one row in a

[physics] An electromagnetic wave, such as radio, with modulations that are used as signals to transmit information.

[GPS] Signal processing that uses the GPS carrier signal to lock onto the PRN code generated by the satellite.

[GPS] GPS measurements that are calculated using the carrier signal of a satellite.

[symbology] A single line representing multiple coincident contour lines, used to show vertical topographic features such as cliffs, cuts, and

A two-dimensional, planar coordinate system in which horizontal distance is measured along an x-axis and vertical distance is measured along

Euclidean geometry

[map design] A diagram or abstract map in which geographical areas are distorted proportionally to the value of an attribute.

[cartography] One who practices the art and science of expressing graphically, usually through maps, the natural and social features of

[cartography] The abstraction, reduction, and simplification of features so that a map is clear and uncluttered at a given scale.